SUNRPC: Kill rpc_clnt->cl_dead

Its use is at best racy, and there is only one user (lockd), which has
additional locking that makes the whole thing redundant.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

include/linux/sunrpc/clnt.h

@@ -45,8 +45,7 @@ struct rpc_clnt {
 				cl_intr     : 1,/* interruptible */
 				cl_discrtry : 1,/* disconnect before retry */
 				cl_autobind : 1,/* use getport() */
-				cl_oneshot  : 1,/* dispose after use */
-				cl_dead     : 1;/* abandoned */
+				cl_oneshot  : 1;/* dispose after use */
 
 	struct rpc_rtt *	cl_rtt;		/* RTO estimator data */